Agilent/Keysight 4349A

The Agilent/Keysight 4349A is a precision high resistance meter delivering simultaneous multi-channel measurements for bench-top and manufacturing environments. Available in single-channel, dual-channel, and four-channel configurations, it measures DC resistance from 1 kΩ to 1.6 × 10¹⁶ Ω and DC current from 60 fA to 100 µA with ±0.6% and ±0.4% basic accuracy respectively. Test voltages range from 0.1000 V dc to 1000.0 V dc, enabling characterization of high-impedance devices, surface and volume resistivity, and low-current phenomena.

The instrument delivers measurements in 9 ms typical, with selectable integration times of 28 ms, 98 ms, and 396 ms. Auto and manual ranging, averaging up to 256 samples, and built-in contact detection (2 ms for capacitive devices) ensure reliable production testing. Open error correction removes parasitic effects, while deviation and percent deviation functions support statistical analysis.

Comparator thresholds (high/in/low) and save/recall of up to 10 measurement states streamline test configuration.

Technical Specifications

• Resistance range: 1 × 10³ Ω to 1.6 × 10¹⁶ Ω


• Current range: 60 fA to 100 µA


• Test voltage: 0.1000 V dc to 1000.0 V dc


• DC current accuracy: ±0.4% basic


• DC resistance accuracy: ±0.6% basic


• Measurement time: 9 ms (typical); 28, 98, 396 ms selectable


• Averaging: 1 to 256


• Delay time: 0 to 9999 ms (1 ms steps)


• Test cable length: 2 m maximum


• Power input: 90–132 V ac or 198–264 V ac, 47–66 Hz; 45 VA typical

Key Features

• Four-channel simultaneous measurements (Option 700)


• Contact check capability (2 ms for capacitive devices)


• Open error correction for parasitic elimination


• GPIB control (IEEE 488)


• Handler interface with isolated, negative-logic signals


• Continuous memory support


• Compact dimensions: 320 mm (W) × 100 mm (H) × 450 mm (D); 6.5 kg

Typical Applications

• High-volume resistivity testing (surface and volume)


• Low-current and high-impedance device characterization


• Contact resistance verification in manufacturing


• Electrostatic discharge (ESD) material qualification

Compatibility & Integration Available with 1, 2, or 4 test channels. Four-channel operation requires external DC source. Supports low-noise test leads (16117C, 16117E), resistivity test fixtures (50 mm, 26 mm, 76 mm electrodes), tweezer fixtures, and wide jaw clips.